Snowplow with extension wings



Feb. 1 8, 1930. J. o. JOHNSON 1,747,302

SNOWPLOW WITH EXTENSION WINGS Filed May 13, 1927 2 Sheets-Sheet l F8). 18, 1930. O JOHNSON, 1,747,302

SNOWPLOW WITH EXTENSION WINGS Filed May 15, 1927 2 Sheets-Sheet 2 IN Vin T027. JOHN 0. tiDH/VJON. a) my flrrm/vnj.

Patented Feb. 18, 1930 UNITED STATES PATENT; OFFICE JOHN O. JOHNSON, OF WHITE BEAR, MINNESOTA, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO ENTERPRISE HOLDING COMPANY, OF MINNEAPOLIS, MINNESOTA, A

coRronAT'IoN or MINNESOTA SNOWPLOW 1TH EXTENSION WINGS Application filed May 13, 1927.

This invention relates to a snow plow and particularly to a snow plow having snow moving means at the sides and rear thereof. In clearing roads with a snow plow it is desirable to move the snow from the entire road surface to the sides thereof and where the snow is not excessively deep, it is desirable to have means connected to the plow which will so move the snow.

It is an object of the invention, therefore, to provide snow moving means having curved or convex surfaces which will move at the side or rear of the snow plow and will move the snow a greater distance to the side of the road than has been done by the plow proper.

It is another object of the invention to provide one or more swinging wings with curved convex outer surfaces at the side and rear of the plow which will move the snow to the side of the road.

It is still another object of the invention to provide a pair of curved wings adapted to move in the rear of the plow at each side thereof having means for extending the same and holding them in extended position, as well as means for holding them in their inner or collapsed position.

These and other objects and advantages of the invention will be fully set forth in the following description made in connection with the accompanying drawings, in which like reference characters refer to similar parts throughout the several views and in v which Fig. 1 is a top plan View of the plow, certain parts being broken away;

Fig. 2 is a rear view of the device;

Fig. 3 is a partial view in side elevation of the device and Fig. 1 is a vertical section taken on line 44 of Fig. 1.

Referring to the drawings, in Fig. 1 a snow plow 10 is shown having a point or prow portion 10 and the mold board portions l0 from which the snow is directed laterally. lVhile any suitable type of snow plow may be used, in the embodiment of the invention illustrated the type of plow disclosed in applicants prior Patent No. 1,419,263,

Serial No. 191,052.

granted June 13, 1922, is shown. The plow pelling members 12 are provided, pivoted to the members 11 by the pins or bolts 13, which members 12 at their rear ends are connected by a frame member 14 which is in turn connected to a tractor which is usually disposed between the members 12 and between the plow l0 and the member 1 1.

In accordance with the present invention, brackets 15 are provided which are'of U-shape or channel shape having the web or bottom of the channel extending along the innerside of the members 12 at the front ends thereof. The members 15 project to the outer sides of members 12 and have spaced lugs 15 at their rear ends and lugs 15 forward of the lugs 15 The brackets 15 also have apertured lugs 15 at their forward ends through which pass the bolts 13. A bolt also passes through the lugs 15 so that the brackets 15 are securely held on the members 12. A pair of wing members 16 having outer convex surfaces are disposed respectively at each side of the plow, which members have brackets 17 at their forward ends secured thereto by suitable bolts 0r rivets, provided with forwardly projecting lugs 17 The brackets 17 also have lugs 17 thereon substantially at each side of their central portions. The lugs 17 are disposedbetween the lugs 15 and a pin or bolt 15 passes through lugs 15 and 17 thus pivotally connecting the wings 16 to the brackets 15. While the wing members 16 may be formed of metal or other suitable material, in the embodiment of the invention illustrated they are shown as formed of several layers of wood as shown in Figs. 2 and 4, and the wings are shown as reinforced at their edges by the channel members 18 and the metal strips 19, which latter members are at the outer sides of said wings. At the rear end of the wings 16 and at the inner sides thereof are brackets 20 suitably bolted or riveted to the wings, which brackets have lugs 20 at their forward portions. The brackets 20 extend across the full width, of the members 20 and the lugs 20 are disposed at each side of the central portion of said plow.

wings between the tops and bottoms thereof. The brackets 20 also have projecting therefrom spaced apertured lugs 2O as shown in Fig. 2. A plurality of links 21 have one of their ends pivoted between pairs of the lugs 20 and extend inwardly from the bracket 20. The links 21 which, in the embodiment of the invention illustrated, are shown as three in number, overlap a pair of links 22 which extend between the links 21. The links 21 at their inner ends are provided with a pair of holes 21. The links 22 also have a plurality of holes 22 adjacent their ends, and headed and nutted bolts 23 are adapted to pass through one of the holes 21" and through one of the holes in the ends of the links 22. Pins 24 also pass through alined holes 21 and 22" as shown in Figs. 1 and 2. The links 21 and 22 can be arranged in alinement with the bolts 23 and pins 24 in place as shown in Fig. 1, and the wings 16 are then in extended position as shown in full lines in said figure. As shown in Fig. 1, members 21 are substantially perpendicular to the outermost or rear end portions of the convex surfaces of members 16 so that said portions are tangent to a line extending substantially parallel to the longitudinal center line of the In order to hold the wings 16 centrally of the frame, a bracket 25 may be used, secured to the rear of the member 1a and extending between the links 22, said brackets having a slot 25 therethrough adapted to aline with a central hole 22 in links 22. A

= pin 26 can be placed through the slot 25 and the holes 22 to hold the links 22 centrally in position relatively to the frame. The links 21 can be moved inward to overlap more or less the links 22, the members 23 and 24 being removed for this purpose and again inserted through two alined holes in said links. As the links 21 overlap the links 22 a greater distance, the straight line formed by said links will be disposed fartherin the rear of the frame and the pin 26 can then be inserted through the holes 22 and through the outer portion of slot 25*. A bracket 27 is secured to the inner side of each wing 16 substantially centrally lengthwise of said wing, which bracket has apertured hubs 27 at its outer end and tie or brace rods 28 extend through the hubs 2T and have ends secured in the lugs 17 b of the bracket 17 and 2O of the bracket 20.

In operation the wings will be connected as shown, and if it is desired to move the snow to both sides of the roadway, the wings will be extended as shown in full lines in Fig. 1. In most cases the link 22 will not be connected to the bracket 25 but the links will move laterally in the wings. A curved convex outer surface on the wings moves the snow in a very effective manner. f wings having straight inclined sides are used, the snow stacks up too much in frontof the wings and too much power is required, to move the wings through the snow. IVith applicants curved form of wing the snow is moved out more gradually and the tractor can easily propel the wings through the snow. If the plow is of the type disclosed in applicants prior patent above identified, the snow will be discharged quite a distance at the side of the road. After such a plow has cleared the central path through the snow, the remaining snow can usually be moved laterally by the wings 16. As above stated, the wings can be adjusted to positions inward of those shown in Fig. 1 by overlapping the links 21 and 22 a greater distance. The wings can be used in this position either connected or disconnected from the bracket 25. The wings are also easily and quickly moved into the collapsible condition shown in dotted lines in Fig. 1 by collapsing the links as shown in said figure.

From the above description it. is seen that applicant has provided a very simple and efficient mechanism by means of which a large portion of the road may be cleared with one forward movement of the snow plow. WVhen the snow is not excessively deep, the road can thus be quickly and eifectively cleared. The snow is moved quite a distance to the side of the road and in many cases can be moved outward onto or past the shoulder of the road. The device is quite simple in construction and forms a convenient attachment for the snow plow and one which can be very easily and quickly connected thereto or removed.

It will, of course, be understood that Various changes may be made in the form, details, arrangement and proportions of the parts, without departing from the scope of applicants invention, which, generally stated, consists in a device capable of carrying out the objects above set forth, in the novel parts and combinations of parts disclosed and defined in the appended claims.

What is claimed is 1. In combination with a snow plow, a frame extending from the rear thereof for propelling the same, a curved wing member hinged to the forward end of said frame at each side thereof, links pivotally connected to each wing member and extending inwardly therefrom, a link extending between said links and means connecting the latter link to said first mentioned links for holding all of said links in alinement to position said wings so as to incline outwardly and rearwardly from said plow, said links being adapted to be folded and collapsed so that said wings may be positioned substantially in the rear of said plow.

2. In combination with a snow plow, a frame for propelling the same comprising spaced side members pivoted to the rear of said plow and extending rearwardly there from substantially in parallel relation, and a member extending between and connecting the rear ends of said members, a bracket secured to the forward end of each of said side members, a pair of wing members pivotally connected at their forward ends respectively to each of said brackets, a link member con nected to the rear end of each of said wing members and extending inwardly therefrom, a link extending between and adapted to be connected to said links, means for holding said links in alined position with said Wing members extending rearwardly and outwardly from said frame, means projecting from said second mentioned member, and means for connecting said last mentioned link to said means for holding said links against lateral movement.

3. A snow plow having in combination, a plow having outwardly and rearwardly diverging surfaces, a frame in the rear of said plow for propelling the same, extension wings pivoted respectively at their forward ends to the sides of said frame, said forward ends being disposed a considerable distance inwardly of the outer edge of said surfaces, said wings having outer convex surfaces thus disposed some distance in the rear of the rear edge of said plow whereby snow moved outwardly by said plow will be engaged by said convex surfaces and moved gradually outwardly with a decreasing lateral movement as the plow and wings move forwardly.

l. The structure set forth in claim 8, the rear ends of said wings when in their outer positions having their outermost surfaces substantially tangent to a line extending parallel to the center line of said plow and frame.

In testimony whereof I aifix my signature.

JOHN O. JOHNSON. 

